Vernier dial for radio adjustments



Sept. 11, 1923. 1,683,845

A. PETELER VERNIER DIAL FOR RADIO ADJUSTMENTS Filed June 12, 1922 TEFL 5 rect connection with the knob and adjusting hub 9. flhe rubber face is also adapted to -7 3 now in use. A further object of the inout of engagement with the rim .of the .90

. tion will appear hereinafter. engaged position by pressing the arm 11 95 Fig. 3;

Patented sept. 1 1.1928. i i h ITED STATES, PATENT; OFFICE...

ADOLPH PETELE or EREEPORT, NEW YoaK, ASSIGNOR TO THOMAS nownor WHITE I PLAINS, new roux. i j

immune DIAL FOB RADIO ADJUSTMENTS.

Application filed June 12, 1922. Serial No. 567,857.

This invention relates to indicating means 1 has rotatably mounted within it the shaft wherebynicer observations may be made of 2 which is in connection with the part to be the adjustment of radio apparatus such as adjusted. Fixed to this. shaft is the usual varioineters,condensers &c. but it may have dial 3 and the knob'a for effecting the ad- 5 other uses. 1 1 justment. j

The usual radio receiving set has a case The Vernier apparatus comprises a housin which apparatus is mounted and upon a 1ng-5 secured to the panel by means of bolts panel board are :placed rotatable knobs or. screws 6. Rotatably mounted in the which are suitably connected with the parts housing is a spindle or shaft 7 on which is to be adjusted and dials or scales are promounted the vernier 8. ,Also fixed to the 65. vided in conjunction with the knobs whereshaft 7 is a knurled hub 9 adapted toengage V by the positions otadjustment of the appawith a rubber-faced wheel 10, the rubber ratus may be observed. face being yielding but sufficiently firm so .Ordinarily these dials are-mounted invdi as to form adriving engagement with the shaft and, as for instance in the case ofa be pressed against the rim of the main dial variometer, the adjustment is made through so as to 'form a frictional dri i 00111160 I a range of one-half the turn of the shaft. t-ion therewith. The'whecl 10' is-rotatablV Ilhe dial therefore is only turnedthrough mounted in one arm of the doublebell one-half of a revolution and consequently crank lever 11 which is rotatabl u t d 75 the indicating scale may only occupy oneupon theshaft 7.

half of the circumference of the dial and Another arinof the bell crank lever as within the space permissible the dialmust shown has secured to it one end of a spring be madeof such size that thegraduations 12, the other end of the spring being seare quite small anddonot permit of a nice cured to a pin 13 in the housing. This 8 observation and adjustment. For this spring tends to "throw the wheel or gear 10 reason the best results are not uniformly into driving engagement with the rim of obtainedbecause it is difficult to accurately the dial 3. l r dj t th t t th b t. iti Another arm 14L otthe bell crank lever It is the main object of the present invenextends through a slot 15 in the bottom of tion to provide means for more accurately the housing 5 so that its extremity at the observing" the adjustment of the'parts and exter or of the casing can be grasped by to this end I provide a Vernier dial which is the fingers and pushed in one direction or compact and readily applicable to the dials the other to .inove the wheel 10 into. and

- vention is to provideCmeans whereby the main dial. To draw this wheel outof envernier may be readily thrown into and out gagcment the arm 11 will be moved towards of operative relation with the main d al. the left (see Fig. 3) against the tensionot.

Other and ancillary objects of the inventhe spring 12 and may be locked in the dis.-

In the accompanying drawings which ilinto the recess or notch 16 opening into the lustrate the invention- I slot .15. On releasing the arm from the.

Fig. 1 is a front elevation of a dial and HOtr-ll the spring will throw the rubber cov i V V ered wheel 10 against the rim ofthe tire; Fig.2 is a bottom plan view of the Vernier Referring now to Figs. 5 and .6, gears 17 structure on an enlarged scale; and 18 which may be substituted for the. Fig. 3 is a view showing a section on the members 9 and 10 of the preceding figures, line 3-3 of Fig. 2 p are rotatably .mounted in a smaller bell @Fig. 4 is a section on the line tit-"4'. of crank as shown, when the tooth engagement shown in 5' will replace the engage- Fig. 5 is a front elevation of a portion of ment of the rubber of the wheel 10 with the a modified form of Vernier gearing; and knurled hub 9. The gear 18 has formed Fig. 6 is a section onthe line 6-6 of upon it a post 19 having the rubber cover- Fi 5 'ing 20 adapted to be pressed against the rim 55 Referring to the drawings theusual panel of the dial. p.

was

It will be, observed that the Vernier will rotate in the same" direction as the main dial which is of advantage in observing the indi- Til? dr ving eennee iens be w n if desired, so that the interpolated rear ings of the Vernier y helmet the dea-re size. n

@It will be seen thatthevernier structure may be applied to the standard form of adjustment indicator of radio receiving sets hy'simply s'ecuringithe housing 5 and its carried parts 130. the panel in properrelation tothens ilal dial and that the Vernier. attachments may be made in a complete unitary structure; requiring nofurtherskill. "l'Vhilo theinvention has been illustrated inwhat is considered its best application it my have other: embodiments without departing from its spirit and is not therefore limited to the, structure shown in the draw- What I :claim is: a

1., The combination with a main indicator ofa Vernier attachment comprising in combination a hou'singQa shaft rotatably mounted therein, a Vernier indicator secured to said 7 shaft upon the exterior of said hous1ng,a

paratus ofi the character lever wlthin the housing pivoted upon said lshaft, a drivingwhel pivoted in sa'iddcver and engaging with said shaft to .drive the same, said driving wheel being adapted to be moved into and rout of 'drivingrelation with the main indicator by turnin' said lever upon: its pivot, aspring tending to fence said driving wheel against said main indies-ton and meanerfor holding said driving wheel out of engagement with said main fmdicator against the bias of said spring.

fiuAwer-nter control device for radioapdescribed, including aj driving wheel having a peripheral driving face of 1 comparatively large diameter, and. a comthe dial.

soft -resilient material of and a manually'rotatablo shaft 012' Compare:

tively small diameter for engaging and re tating thewheel to rotate thevdial, said dial and shaft being movable in the same rotary direction.

5, A VGIIllGI control for radio apparatus of the character described including a main operating shaft, a manually rotatable shaft having a hard driving-face of comparative r small diameter, anda 'wheelintermediat'o the inam and aux liary shafts having acomparatlv-ely soft peripheral face engaged by the auxiliary shaft when rotated to rotate the main shaft.

6.1a freely rotatable dial, a bell crank lever, a rollcr journaleil in o'neofi the twins and movable into and out of engagement withthe dial as thcdover is moved about its 01 1)! adioapparatps go engaging the dial surface,

a wheel having afriet-ion pivot, and a knob like device. connected with the roller for rotating the latter :withrespeet to the lever to rotatethedial,thesaid roller having a surfaceof slightly yieldi n material to frietionally'engage the perip ieryiof anotrn Emma have siguedithis 

